EP1381998B1 - Unite de rendu de corps volumiques - Google Patents

Unite de rendu de corps volumiques Download PDF

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Publication number
EP1381998B1
EP1381998B1 EP02725716A EP02725716A EP1381998B1 EP 1381998 B1 EP1381998 B1 EP 1381998B1 EP 02725716 A EP02725716 A EP 02725716A EP 02725716 A EP02725716 A EP 02725716A EP 1381998 B1 EP1381998 B1 EP 1381998B1
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EP
European Patent Office
Prior art keywords
cell
voxel
face
volume
polyhedral
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
EP02725716A
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German (de)
English (en)
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EP1381998A4 (fr
EP1381998A1 (fr
Inventor
Andres C. Callegari
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Landmark Graphics Corp
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Landmark Graphics Corp
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Landmark Graphics Corp filed Critical Landmark Graphics Corp
Priority to DK11002571.5T priority Critical patent/DK2362346T3/da
Priority to EP11002571.5A priority patent/EP2362346B1/fr
Publication of EP1381998A1 publication Critical patent/EP1381998A1/fr
Publication of EP1381998A4 publication Critical patent/EP1381998A4/fr
Application granted granted Critical
Publication of EP1381998B1 publication Critical patent/EP1381998B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01V—GEOPHYSICS; GRAVITATIONAL MEASUREMENTS; DETECTING MASSES OR OBJECTS; TAGS
    • G01V1/00—Seismology; Seismic or acoustic prospecting or detecting
    • G01V1/28—Processing seismic data, e.g. for interpretation or for event detection
    • G01V1/30—Analysis
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06T—IMAGE DATA PROCESSING OR GENERATION, IN GENERAL
    • G06T15/00—3D [Three Dimensional] image rendering
    • G06T15/08—Volume rendering
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06T—IMAGE DATA PROCESSING OR GENERATION, IN GENERAL
    • G06T17/00—Three dimensional [3D] modelling, e.g. data description of 3D objects
    • G06T17/05—Geographic models
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06T—IMAGE DATA PROCESSING OR GENERATION, IN GENERAL
    • G06T7/00—Image analysis
    • G06T7/10—Segmentation; Edge detection
    • G06T7/11—Region-based segmentation
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06T—IMAGE DATA PROCESSING OR GENERATION, IN GENERAL
    • G06T7/00—Image analysis
    • G06T7/10—Segmentation; Edge detection
    • G06T7/187—Segmentation; Edge detection involving region growing; involving region merging; involving connected component labelling
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06V—IMAGE OR VIDEO RECOGNITION OR UNDERSTANDING
    • G06V10/00—Arrangements for image or video recognition or understanding
    • G06V10/20—Image preprocessing
    • G06V10/26—Segmentation of patterns in the image field; Cutting or merging of image elements to establish the pattern region, e.g. clustering-based techniques; Detection of occlusion
    • G06V10/267—Segmentation of patterns in the image field; Cutting or merging of image elements to establish the pattern region, e.g. clustering-based techniques; Detection of occlusion by performing operations on regions, e.g. growing, shrinking or watersheds
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06V—IMAGE OR VIDEO RECOGNITION OR UNDERSTANDING
    • G06V10/00—Arrangements for image or video recognition or understanding
    • G06V10/94—Hardware or software architectures specially adapted for image or video understanding
    • G06V10/955—Hardware or software architectures specially adapted for image or video understanding using specific electronic processors
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06T—IMAGE DATA PROCESSING OR GENERATION, IN GENERAL
    • G06T2207/00—Indexing scheme for image analysis or image enhancement
    • G06T2207/20—Special algorithmic details
    • G06T2207/20112—Image segmentation details
    • G06T2207/20156—Automatic seed setting
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06T—IMAGE DATA PROCESSING OR GENERATION, IN GENERAL
    • G06T2207/00—Indexing scheme for image analysis or image enhancement
    • G06T2207/30—Subject of image; Context of image processing
    • G06T2207/30181—Earth observation

Definitions

  • a suitable computer has, for example, a processor 10, main memory 12 in which programs and data are stored during operation, input/output control 14, a hard disk 16 or similar device in which programs and data are stored in a non-volatile manner, a keyboard 18, a mouse or similar pointing device 20, and a video monitor or other display device 22 on which IVs 23 can be rendered.
  • a graphics accelerator 24 of the type commonly included in personal computers for facilitating three-dimensional rendering can also be included.
  • the computer includes other hardware and software elements that are not illustrated for purposes of clarity but that are commonly included in such computers.
  • Step 40 can also include defining an "extent.” That is, a user can select only a portion or subset of a volume dataset to provide to pre-processing step 34.
  • a volume dataset can be divided into portions or subsets so that only those of interest are processed or so that the various portions can be processed separately from one other. Dividing volume datasets in this manner is especially conducive to multitasking or multiprocessing computing systems in which the processing at step 34 can be performed by multiple threads essentially in parallel with one another; one thread can be processing one portion while another thread is processing another portion.
  • Depopulation can also be performed at step 50.
  • Depopulation refers to a scaling operation that renders the data using fewer voxels when the user's viewpoint is farther away from the image than when the user's viewpoint is closer. In other words, if the view is more distant, a number of voxels can be rendered as a single voxel.
  • step 50 is responsive to user interface input indicating a distance from the viewpoint to the image.
  • Each cell can be asynchronously depopulated at process/render time because each cell contains position and state information.
  • the depopulation can occur during rendering or processing depending on the desired results. For example, it may be desired to mix multiple attributes in an IV by rendering them at different depopulation locations.
  • step 74 If it is determined at step 74 that a count bit volume exists, it is reset at step 76. If one does not exist, one is created at step 78.
  • a recursive process is begun at step 90 in which the irregular volume to which the seed cell belongs is assigned a master identifier, and each cell in that IV is identified and added to an IV cell counter field. Information describing each identified cell, such as its location and the identifier identifying the irregular volume to which it belongs, is stored in a data structure corresponding to that cell.
  • the recursive "process IV from seed cell” process is described in further detail below. The process of searching for seed cells and processing the IV to which each identified seed cell belongs is repeated until it is determined at step 92 that all cells in the input volume dataset have been sampled.
  • an operation that can be performed at step 102 upon an identified IV is minimum or maximum attribute projection-display.
  • the IV is processed so that all cells that have a property that identifies them as skin cells, i.e., cells on the outer voxel skin of the IV, receive a new attribute value.
  • Columns of cells from the IV are processed by determining the number of voxels between the top cell, i.e., the skin cell, and a non-existent cell within the bit volume.
  • the bit volume is marked with all the existing cells.
  • the attribute values of the top cells are then compared with the following continuous existing cells in the column.
  • the maximum or, in other cases, the minimum attribute value replaces the top cell attribute value.
  • the same operation is performed for the bottom cells.
  • This projection can be performed using a normal or view/projection vector that is provided.
  • This routine identifies cells that meet a Boolean AND condition, which can be that two cells exist- in two different IVs from one or more datasets or for later processing of cells that occupy the same spatial location.
  • a Boolean AND condition can be that two cells exist- in two different IVs from one or more datasets or for later processing of cells that occupy the same spatial location.
  • step 132 it is determined if the AND cells are selected, i.e., whether they are to be displayed in a distinctive color when the resulting IV is displayed. If they are selected, step 134 represents a suitable routine or method isolating cells that exist only in the first volume. For example, cells are isolated if a Boolean AND operation is to be performed between two coexisting Its, but it is desired to render only the common cells that exist only in the first IV.

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Theoretical Computer Science (AREA)
  • Remote Sensing (AREA)
  • Software Systems (AREA)
  • Computer Graphics (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Geometry (AREA)
  • Computer Vision & Pattern Recognition (AREA)
  • Multimedia (AREA)
  • Environmental & Geological Engineering (AREA)
  • Acoustics & Sound (AREA)
  • Geophysics (AREA)
  • Geology (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Image Generation (AREA)
  • Amplifiers (AREA)
  • Paper (AREA)
  • Transition And Organic Metals Composition Catalysts For Addition Polymerization (AREA)
  • Signal Processing Not Specific To The Method Of Recording And Reproducing (AREA)
  • Massaging Devices (AREA)
  • Bidet-Like Cleaning Device And Other Flush Toilet Accessories (AREA)

Claims (12)

  1. Procédé de codage en voxels d'un jeu de données volumique comprenant une multiplicité de cellules, comprenant les stades dans lesquels :
    on définit une multiplicité de voxels polyédriques, chaque voxel polyédrique correspondant à une seule cellule ;
    on mémorise une représentation de chaque voxel polyédrique, la représentation comprenant une chaîne de face, ayant une pluralité de bits, et une chaîne de position, ayant une pluralité de bits, chaque bit de la chaîne de face correspondant à une seule face du voxel polyédrique et ayant une valeur indiquant si la face doit être affichée, la chaîne de position ayant une valeur indiquant une position spatiale en trois dimensions du voxel polyédrique ; et
    on rend la représentation de chaque voxel polyédrique, la chaîne de face d'au moins une représentation de voxel polyédrique ayant un bit d'une valeur indiquant au moins une face à afficher d'une cellule interne.
  2. Procédé suivant la revendication 1, dans lequel le stade dans lequel restituer la représentation de chaque voxel polyédrique comprend la transformation de chaque face ou voxel à afficher en une primitive choisie dans le groupe consistant en un point, en une ligne et en un polygone.
  3. Procédé suivant la revendication 1, dans lequel la représentation de chaque voxel polyédrique mémorisé dans une mémoire comprend en outre un bit indiquant si le voxel est sélectionné.
  4. Procédé suivant la revendication 1, dans lequel la représentation de chaque voxel polyédrique mémorisée dans une mémoire comprend en outre une chaîne normale ayant une valeur indiquant l'ombrage de chaque face à afficher.
  5. Procédé suivant la revendication 1, dans lequel :
    chaque voxel polyédrique est représenté en un cube ayant six faces ; et
    chaque bit de la chaîne de face a une valeur indiquant si la face doit être affichée.
  6. Procédé suivant la revendication 5, comprenant en outre :
    le stade de transformation de chaque face à afficher en une primitive en divisant chaque face en deux triangles.
  7. Produit de programme informatique pour codage en voxels d'un jeu de données volumiques, comprenant une multiplicité de cellules, comprenant un support pouvant être utilisé sur un ordinateur et pourtant :
    un moyen de définition d'une multiplicité de voxels polyédriques, chaque voxel polyédrique correspondant à une seule cellule ;
    un moyen de mémorisation d'une représentation de chaque voxel polyédrique, la représentation comprenant une chaîne de face, ayant une pluralité de bits, et une chaîne de position, ayant une pluralité de bits, chaque bit de la chaîne de face correspondant à une seule face du voxel polyédrique et ayant une valeur indiquant si la face doit être affichée, la chaîne de position ayant une valeur indiquant une position spatiale en trois dimensions du voxel polyédrique ; et
    un moyen de restitution de la représentation de chaque voxel polyédrique, la chaîne de face d'au moins une représentation de voxel polyédrique ayant un bit qui a une valeur indiquant au moins une face à afficher d'une cellule interne.
  8. Produit de programme informatique suivant la revendication 7, dans lequel le moyen de restitution de la représentation de chaque voxel polyédrique comprend un moyen de transformation de chaque face à afficher en une primitive choisie dans le groupe consistant en un point en une ligne, et en un polygone.
  9. Produit de programme informatique suivant la revendication 7, dans lequel la représentation de chaque voxel polyédrique mémorisé dans une mémoire d'ordinateur comprend en outre un bit indiquant si le voxel est sélectionné.
  10. Produit de programme informatique suivant la revendication 7, dans lequel la représentation de chaque voxel polyédrique mémorisée dans une mémoire d'ordinateur comprend en outre une chaîne normale ayant une valeur indiquant l'ombrage de chaque face à afficher.
  11. Produit de programme informatique suivant la revendication 7, dans lequel :
    chaque voxel polyédrique est représenté sous la forme d'un cube ayant six faces ; et
    chaque bit de la chaîne de face a une valeur indiquant si la face doit être affichée.
  12. Produit de programme informatique suivant la revendication 11, comprenant en outre un moyen de transformation de chaque face à afficher en une primitive en divisant chaque face en deux triangles.
EP02725716A 2001-04-18 2002-04-17 Unite de rendu de corps volumiques Expired - Lifetime EP1381998B1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
DK11002571.5T DK2362346T3 (da) 2001-04-18 2002-04-17 Fremgangsmåde og computerprogramprodukt til volumenrendering
EP11002571.5A EP2362346B1 (fr) 2001-04-18 2002-04-17 Procédé et produit de programme d'ordinateur pour le rendu d'un volume

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
US28471601P 2001-04-18 2001-04-18
US284716P 2001-04-18
PCT/US2002/012160 WO2002086796A1 (fr) 2001-04-18 2002-04-17 Unite de rendu de corps volumiques

Related Child Applications (1)

Application Number Title Priority Date Filing Date
EP11002571.5 Division-Into 2011-03-28

Publications (3)

Publication Number Publication Date
EP1381998A1 EP1381998A1 (fr) 2004-01-21
EP1381998A4 EP1381998A4 (fr) 2007-07-18
EP1381998B1 true EP1381998B1 (fr) 2012-01-11

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Family Applications (2)

Application Number Title Priority Date Filing Date
EP11002571.5A Expired - Lifetime EP2362346B1 (fr) 2001-04-18 2002-04-17 Procédé et produit de programme d'ordinateur pour le rendu d'un volume
EP02725716A Expired - Lifetime EP1381998B1 (fr) 2001-04-18 2002-04-17 Unite de rendu de corps volumiques

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EP11002571.5A Expired - Lifetime EP2362346B1 (fr) 2001-04-18 2002-04-17 Procédé et produit de programme d'ordinateur pour le rendu d'un volume

Country Status (10)

Country Link
US (3) US7412363B2 (fr)
EP (2) EP2362346B1 (fr)
AT (1) ATE541274T1 (fr)
AU (1) AU2002256265C1 (fr)
CA (4) CA2936404C (fr)
DK (2) DK2362346T3 (fr)
ES (1) ES2378357T3 (fr)
NO (1) NO331849B1 (fr)
PT (1) PT1381998E (fr)
WO (1) WO2002086796A1 (fr)

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EP2362346B1 (fr) 2013-07-10
CA2936413A1 (fr) 2002-10-31
PT1381998E (pt) 2012-01-24
CA2834997A1 (fr) 2002-10-31
EP1381998A4 (fr) 2007-07-18
CA2834997C (fr) 2016-09-13
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US20020165689A1 (en) 2002-11-07
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US7412363B2 (en) 2008-08-12
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US20100286972A1 (en) 2010-11-11
US7991600B2 (en) 2011-08-02
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